==== four ways of saying five ==== 
http://www.sf.airnet.ne.jp/~ts/language/number.html
==== 'black' ways of saying 'red'====
http://www.hermetic.ch/misc/numcol.htm  
==== khipu / inca ====
  * links     
    * http://wiscinfo.doit.wisc.edu/chaysimire/titulo2/khipus/what.htm     
    * http://www.angelfire.com/mo/zdawg/Khipu/Khipu.html  
  * books     
    * "Signs of the Inka Khipu, Binary Coding in the Andean Knotted-String Records" By Gary Urtonhttp://www.utexas.edu/utpress/books/urtsig.html     
    * online 'Databooks and How to Use Them' http://instruct1.cit.cornell.edu/research/quipu-ascher/contents.htm 
==== rnd ==== 

"...articles and software concerning calendars, date conversion, encryption, factorization, prime numbers, cellular automata, C and HTML programming, lunar phases and eclipses and other scientific, business and computational topics." http://www.hermetic.ch/   

see also: [[Category Mathematics]]